Two forms of the solid byproduct from the use of hydroxyalkyl hexahydrotriazine as a hydrogen sulfide scavenger were investigated. The crystalline monomeric dithiazine and the intractable solid, known formerly as amorphous dithiazine. It was implied that the latter was simply another solid form of the same chemical species. The exact chemical structure and derivation of amorphous dithiazine were investigated in this study and the analytical data suggest that the material is polymeric in nature.